andras/sdf-2d-demo
andras/sdf-2d-demo
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This commit is contained in:
schmelczerandras 2020-09-22 18:21:02 +02:00
commit ba7d4659ee
1 changed files with 34 additions and 18 deletions
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28
src/scenes/blob/blob.ts
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@ -5,14 +5,12 @@ export class Blob extends Drawable {
public static descriptor: DrawableDescriptor = {
sdf: {
shader: `
uniform struct {
vec2 headCenter;
vec2 leftFootCenter;
vec2 rightFootCenter;
float headRadius;
float footRadius;
float k;
}[BLOB_COUNT] blobs;
uniform vec2 headCenters[BLOB_COUNT];
uniform vec2 leftFootCenters[BLOB_COUNT];
uniform vec2 rightFootCenters[BLOB_COUNT];
uniform float headRadii[BLOB_COUNT];
uniform float footRadii[BLOB_COUNT];
//uniform float ks[BLOB_COUNT];
float smoothMin(float a, float b)
{
@ -27,9 +25,9 @@ export class Blob extends Drawable {
void blobMinDistance(inout float minDistance, inout float color) {
for (int i = 0; i < BLOB_COUNT; i++) {
float headDistance = circleDistance(blobs[i].headCenter, blobs[i].headRadius);
float leftFootDistance = circleDistance(blobs[i].leftFootCenter, blobs[i].footRadius);
float rightFootDistance = circleDistance(blobs[i].rightFootCenter, blobs[i].footRadius);
float headDistance = circleDistance(headCenters[i], headRadii[i]);
float leftFootDistance = circleDistance(leftFootCenters[i], footRadii[i]);
float rightFootDistance = circleDistance(rightFootCenters[i], footRadii[i]);
float res = min(
smoothMin(headDistance, leftFootDistance),
@ -43,7 +41,13 @@ export class Blob extends Drawable {
`,
distanceFunctionName: 'blobMinDistance',
},
uniformName: 'blobs',
propertyUniformMapping: {
footRadius: 'footRadii',
headRadius: 'headRadii',
rightFootCenter: 'rightFootCenters',
leftFootCenter: 'leftFootCenters',
headCenter: 'headCenters',
},
uniformCountMacroName: 'BLOB_COUNT',
shaderCombinationSteps: [1],
empty: new Blob(vec2.fromValues(0, 0)),